Two-cycle engine.



J. H. MOSIER.

TWO CYCLE ENGINE. APPLICATION FILED NOV. 11, 1911.

' 1,109,694; Patented Sept. 8, 1914.

2 SHEETS-SHEET 1.

y Snow 1km J. H. MOSIER.

TWO CYCLE ENGINE.

APPLICATION FILED NOV.11, 1911.

Patented Sept. 8, 1914.

2 SHEETS-SHEET 2';

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JOSEPH MOSIER, OF PROVEMONT, MICHIGAN.

Two-crow ENGINE.

particularly the inlet ports, and the object of the invention istoincrease the efficiency of the engine and develop a greater amount ofpower from a given charge by so arranging the ports thatthe incomingfresh charge does not. mingle with the products of combustion, wherebythe new charge is weak- -(il16d, nor does any of the fresh charge escapethrough the exhaust openmg.

A further object of the invention is to prevent back firing in thecompression chamber through a delayed or late firing of the explosivemixture, such. delayed or late firing beii'ig usually caused by too'leana mixture of the explosive gas, working upon the same principle as in agun which hangs fire by reason of damp powder. In such case, as in j thecase of a lean mixture, a portion of the charge must first burn toproduce enough heat to tire the full charge. in the case of an engineincoming gases come into contact withsuch a delayed combustion, and areig- -nited by it, thereby resulting iii-back thing. When the incominggas is admitted-at the top of the cylinder it does not come intoimmediate contact with burnt gas escaping at the exhaust port, which isalways the hottest part of an engine in operation. Furthermore when isadmitted into the top f the cylinder the gas is always pure around vthespark plug thereby causing a quick, sure. powerful and completeexplosion and this in turn preyents carbon deposits on the piston head.Such depositswhen formed burn or are incandescent for a moment aftereach explosion, and after the incoming is ad-' mitted into the lowerportion of the chamber it. comes into contact with such burning depositand is liable to become ignited pre maturely thereby causing backfiring.

In the accompanying drawings, Figure 1 is a central Vertical sectionthrough the upper portion of the engine cylinder, the pisto n being atthe'end of the'up stroke. Fig. i

-2 is a vertical section taken at right angles to that of Fi g. 1 andshowing the piston in Specification of Letters Patent.

Application filed November Patented Sept. 8, 1914. n, 1911. Serial No.659,694.

l its lowest position. Fig. 3 is a cross section upon the line 3-3 ofFig. 1. Fig. el is a cross section upon the line 4-at of Fig. 2.

In these drawings, 1 represents that portion 01 the engine cylinder inwhich works a ture is introduced and ignited by means of a suitableignition device 3. In the upper portion of said cylinder and uponopposite sides are arranged inlet ports a and below these ports and at adistance from them but somewhat less than, the length of the piston 2are intake ports 5, the ports 4. and being c0nnected upon opposite sidesof the piston respectively by vertical passages (E. Arranged at rightangles to the ports 5 and in a horizontal plane substantially the sameas that of the lower edges of the ports 5 are exhaust openings 7. In amotor of small size one exhaust port would be sullicient but in a largerengine such as I ha re illustrated it is preferable to provide two ofthese exhaust ports upon opposite sides of the cylinder, but they areconnected to a connnon exhaust outlet 8 by mean of suitable passages J,which passages are inclined slightly downward in order to bring theexhaust outlet below the plane of the port 5 upon that side of hecylinder, as shown most clearly in Fig. i.

The piston and outwardly extending lips 10 upon the sides adjacent theports 4 and through or immediately beneath said lips the piston head isprovided with passages 11, which are adapted to place theports 4 intocommunication with the interior of the hollow piston, and also with thelower portion of the cylinder when the lips 10 are above said ports, asshown in Fig. 1. 1

ASSllllllllQ' that the parts are in the position oer-u 'ed in Fig. 2,that. is the piston head is in its lowest position; the passages 11 arein ccmnnn'iication with the ports 5, and the explosivc mixture which isintroduced into the lowest portion of the engine cy inder by any desiredmeans, not shown, passes through the passages 6 and ports 4 into the:upper portion of explosion chanber of the cylinder 1. Upon the up strokeof the piston the said charge is compressed and it will sion orcompression of the said charge has it been adnntted dircctl y to thatportion or" the cylinder in communication with the exhaust is providedwith upwardly he operation of the engine is as follows through the ports11 into the ports 5- be noted that at no time during the admispiston 2and into which an explosive mixduring the time ports 7. The charge isthen fired and as a result of the explosion the piston is moveddownwardly, the lower portion of th'e'piston at the time of theexplosion covering the ports 5. When the piston reaches its lowest pointof travel it uncovers the exhaust ports and at the same time brings thepassages 11 into communication again with the ports 5, the lips 10acting as shields between the ports 5 and the exhaust passages. Theburned gases therefore pass out through said exhaust passages as the'newcharge is admitted through the passages 11 of the piston head, and thereis at no time any possibility of commingling of the burned products inthe new charge being taken in.

What I claim is 1. In an internal combustion engine, a cyl inderhaving'intake ports arranged upon opposite sides thereof, inlet ports invertical alinementwith said intake ports, each inlet port havingcommunication with one of the intake ports through a longitudinalpassage, said cylinder having an exhaust port out of horizontal andvertical alinement with the intake ports, and a piston provided uponopposite sides with upwardly and outwardly extending lips, said pistoneing hollow and downwardly open, and having passages in said lips, saidpassages being adapted'to register with the intake ports, andthe saidpiston covering the exhaust port during the entire time that said lipscover the inlet ports, the piston uncovering the exhaust port only thatsaid lips register with the intake ports.

2. In an internal combustion engine, a cylinder, igniting means arrangedin one end of the cylinder, inlet portsformed in oppoing also an exhaustport adjacent the site sides of the cylinder and adjacent the ignitiondevice, a set of intake ports arranged in longitudinal alinement withthe ports first mentioned, longitudinally extending passzwes connectingthe intake and inlet ports respectively, an exhaust port off-set withrespect to the intake ports, a hollow piston open at one end and havingu'pwardl extending lips upon the end adjacent the ignition device, andhaving passages through said lips, the said lips being adapted to coveralternately the intake and inlet.

ports, the passages registering with said ports, and said piston beingof such length that the exhaust port will be covered during the timethat said lips cover the inlet ports, said lips covering the intake.ports during the entire time that the exhaust port is open.

3. An internal combustion engine comprising a cylinder open at one endand h 2W- ing an ignition device at i inner end. 5' having inlet portsdischar; said' inner end portion of t adjacent said ignition device, thei i l tffl der having also ports having free cmnm 1,-

cation through longitudinal passages with cylinder havsaid secondmentioned ports, and a piston provided with lips adapted to cover thefirst and second mentioned ports alternately, said lips having passagesthercthrough adapted to be brought into alinement with said ports as thelips pass by them.

a'osnrn n MOSIER.

the first mentioned ports, said Witnesses Eow. BOUTAIN,- HA ROLD PORTER.

